Scale-removing device.



No. 682,044. .Patented Sept. 3, |90I.

G. W. DEAN. v

scALE BEMUVING mzvlczl` (Application led Feb, 9, 1901.) (N0 Model.)

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Inventor.`

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UNITED STATES PATENT OEEICE.

GEORGE lV. DEAN, OF FORT ERIE, CANADA, ASSIGNOR OF ONE-HALF TO GEORGE B.NYE, OF BUFFALO, NEllT YORK.

scALE-REMovlNG DEVICE.

SPECIFICATION forming part of Letters Patent No. 682,044, datedSeptember 3, 1901. Application filed February 9, 1901- Serial No.46,664. (No model.)

To all whom it may concern,.-

Beit known that I, GEORGE W. DEAN, a subject of the King of GreatBritain, residing at Fort Erie, in the county of Welland, Province ofOntario, and Dominion of Canada, have invented certain new and usefulImprovements in Scale-Removing Devices, of which the following is aspecification.

My invention relates to an improved device for removing scale fromboiler-fines and the like; and one of the objects of the invention is toform the shell of the device in parts which can be separated to permitdismounting the mechanism for cleaning or repairing.

The invention further relates to the pecul-iar form of valve mechanismemployed and to certain details of construction of the hammer mechanism.

For a full understanding of the merits and advantages of the inventionreference is to be had to the accompanying drawings and the followingdescription.

The invention is susceptable to various changes in the form, proportion,and minor details of construction without departing from the principleor sacrificing any of the advantages thereof, and to a full disclosureof the invention an adaptation thereof is shown in the accompanyingdrawings, in which- Figure 1 is a longitudinal section on line o. ct,Fig. 2, through a fragment of a pipe or ilue, also showing one of thehalves of myimproved scale-removing device. Fig. 2 is a longitud inalsection on line b h, Fig. 1. Fig. 3 isl a transverse section on line c.c, Fig. 1. is a transverse section on line d d, Fig. 1. Fig. 5 is anenlarged fragment of one of the halves, showing the valve movement. Fig.6 is a fragment of the piston with a longitudinal section through themovable valve device.

The shell of the device is formed in two halves, each of which is aduplicate of the other and is denoted by the numeral 1. Each shellportion 1 has a steam-chamber 2, a lon-` gitudinallyextending steamport3, which communicates with the steam chamber through a short transverseopening 4, and a longitudinally extending exhaust port 5, whichcommunicates with the steam-chamber at several points, as will be morespecically described further on. Each half portion has recesses ordepressions to receive the piston, the hammer, and the connectionbetween the piston and hammer. The piston 61s formed with two enlargedportions or shoulders, one numbered 7 at its rear end and anothernumbered 8, located at or near the middle, and a tubular valve device 9is arranged upon the piston between these shoulders and has a limitedlongitudinal movement thereon between said shoulders. This valve devicehas a series of enlargements or valve-closing rings 10, which-areseparated from each other by steamreceiving spaces 11. The forward endof the piston is shaped to form an eye l2, and the hammer or striker 13is connected to the piston by the connecting-rods 14, which arepivotally fastened to the hammer and piston end by the pintles 15 and16. The hammer or striker 13 is of a curved form and has an eye portion17 at one end, through which thelpivotingpintle 18 passes. Two halves ofthe shell are detachably secured together by a series of bolts 19, whichpass through said halves at suitable intervals, and the pivoting-pintle18 serves as an additional fastening for the two halves. Twoconnecting-rods llare preferably employed, one being arranged on eachside of the hammer. Each half is provided with ya shallow depression orrecess 2O at its forward end, of similar form,which register with eachother when the two halves are together and form a space in whichthehammer operates. AThe inner edge or wall 21 of the recess 2O conforms inshape to the curved inner edge 22 of the hammer, so that when the hammeris in its rearward position its inner edge for nearly its entire lengthis in contact with the wall lof the recess, and the outer edge or wall2la likewise conforms to the' curve of the outer 'edge 222L of thehammer. The hammer in operating plays between the inner and outerirregular walls of the recess, and the eye or pivotal end 17 issubstantially circular, except where it joins the hammerbody, and litsin the substantially circular slot in the shell-body. '(See Fig. 1.)This prevents the wear and tear which would necessarily ensue should thehammer strike at a point or points only. A secondary recess 23, which issmaller than the recess 2O IOO and substantially rectangular in shape,is formed in each of the halves in the bottom of the recess 20, in whichone of the connecting-rods `let is supported and travels. The pintles 15and 16 are about equal in length to therdistance between the bottomsurface ofA -the opposed recesses 23, and are held against pivotaldisplacement between said bottom surfaces. (See Fig. 2.) Twolongitudinally-extending openings or chambers 24: and 25 for conductingthe steam are formed in each half on one side of the steam-chamber, theends of each of which curve into communication with the steam-chamber atone end of the chamber and at an intermediate point. (See Fig. l.) Theseopenings serve to conduct the steam against the forward and rearshoulders 7 and 8 of the' piston, and thus reciprocate the same, and thevalve-closing rings on the movable valve device serve to shut off orclose the intermediate ends of the openings alternately, and thus closeone or the other of the openings against steam according to the relativeposition of the piston. Referring to Fig. 5 for an eX- planation of thisportion of the mechanism, in which the piston is in its rearwardposition, steam is admitted through "the steamports 3 into thesteam-chamber 2 and passes into the intermediate connecting end 26 ofthe opening or channel 24: and then rearwardly and through the rear end27 against the rear end of the piston or shoulder '7, forcing itforward. When the piston nears the limit of its forward movement, themovable valve device moves so as to bring one of lthe rings 10 intoclosing position relative to the end 26 of the opening 24 and openingthe intermediate end 28 of the opening or chamber 25 and permitting thesteam to pass through said opening or channel 25 and the curved forwardend -29 of said opening against the forward shoulder 8 and reversing themovement of the piston.

30 and 3l represent the main openings, which communicate with theexhaust-ports, and 32 and 33 small vents, which also communicate withthe exhaust-ports and serve as outlets-for the steam between theshoulders 7 and 8 and the adjacent portions of the valve device. Themain or large openings 30 or 3l are opened and closed by the rings l0,and the small vents 32 and 33 are opened and closed by the shoulders 7and 8.

I claim as my invention- 1. A scale-removing device comprising a shellformed in two separable half portions; each half having a depressionforming half of the valve-chamber, a recess forming half of ahammer-receiving space and a secondary recess forming a pocket, a pistonin the valvechamber, a hammer in the hammer-receiving space andconnections in the pockets pivoted to the hammer and piston.

2. vA scale-removing device comprising a shell having a steam-chamber, ahammer supported in said'shell, an actuating-piston in thesteam-chamber, rods connecting the pistonto the hammer and a tubularvalve device slidably encircling the piston and having a series ofsteam-receiving spaces.

3. A scale-removing device comprising a shell having a steam-chamber, ahammer supported in said shell, an actuating-piston in the steam-chamberhaving a reduced portion, rods connecting the hammer to the reducedportion of the piston, and a tubular valve device slidably encirclingthe reduced portion of the piston and having a series of transversegrooves forming a plurality of steam-receiving spaces.

4. A scale-removing device comprising a shell formed in halves; eachhalf having exhaust and inlet ports, a depression forming part of avalve-chamber and a recess forming part of a hammer-receiving chamber, areciprocating piston in the valve-chamber, a hammer in thehammer-receiving chamber, and a valve device slidably mounted on thepiston and having a plurality of transverse steamspaces and rings orenlargements between the spaces.

5. In a scale-removing'device, a shell havdisposed walls of curvingconformatiomof an angular hammer having two curved side edgescorresponding to the curves ofthe walls and adapted to play between saidwalls.

6. In a scale-removing device, a shell having a chamber provided withirregular'oppositely-disposed walls and a pivotal space having anearly-circular Wall, ofan angular hammer having opposite side edgesconforming to the irregular Walls and a pivoted end 'portion fitting inthe pivotal space and having a curved edge con-forming to the wall ofsaid space.

7. A scale-removing device comprising a shell, a curved hammer pivotedat one end in said shell, a centrally-arran ged actuating'piston androds pivot-ally connectedat one end to an intermediate portion of thehammer and at the opposite end to thepiston.

8. A scale-removing devcecomprisinga shell, a comparatively large curvedvhammer in said shell, an actuating-piston having a reduced end providedwith oppositeflat surfaces and fiat connections pivoted tothe piston endand the hammer.

9. A scale-removing device comprising a shell having a centrallongitudinal opening which enlarges at one end to form a valvechamber,reduces at one intermediate point to form a pocket and enlarges at theopposite end to form an irregular walled hammerspace, a piston in thevalve-chamber having a reduced end extending into the pocket, an angularhammer pivoted at one end and having curved surfaces conforming to theirregular walls of the hammer-space, and two flat connections arrangedon opposite sides of and pivoted to the hammers and piston.

ing a chamber provided with two oppositely- ICO 10. A scale-removingdevice comprising a mer pivoted at one end in the hammer-space shellformed in longitudinal halves and each and curving across the pocket androds in the half having a longitudinal depression which pocket pivotedto the hammer and piston end. 1o

forms part; of a valve-chamber, a hammer-re- GEORGE W. DEAN. 5 ceivingspace and an intermediate pocket, a, Vitnesses:

piston in the valve-chamber having a. reduced L. M. BILLINGS,

end extending in to the pocket, a curved ham- GEO. A. NEUBAUER.

